/* Iqra — shared styles. Mobile first: base rules are for phones, wider screens add layout in media queries. */

:root {
  --paper: #FAF9F5;
  --paper-2: #F5F4EF;
  --card: #FFFFFF;
  --ink: #1F1E1D;
  --muted: #6B6A65;
  --line: #E8E6DC;
  --teal: #C96442;
  --teal-ink: #FFFFFF;
  --teal-soft: #F7E8E1;
  --sun: #E9B028;
  --right: #2E7D4F;
  --right-soft: #E4F1E8;
  --wrong: #B5473A;
  --wrong-soft: #F6E4E1;
  --focus: #C96442;
  --draw: #1F1E1D;
  --draw-fill: #EBE9E1;
  --font-sans: "Inter", system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --sans: var(--font-sans);
  --serif: var(--font-sans); /* legacy name: body text is sans; serif is only used through --font-serif on big headings */
  --text-display: var(--text-h1); /* hero uses the H1 size from the spec */
  --text-h1: 40px;
  --text-h2: 28px;
  --text-h3: 20px;
  --text-body: 16px;
  --text-small: 14px;
  --text-label: 12px;
  --text-code: 14px;
  --lh-h1: 1.15;
  --lh-h2: 1.25;
  --lh-h3: 1.35;
  --lh-body: 1.65;
  --lh-small: 1.5;
  --lh-code: 1.6;
  --measure: 680px;
  --r-sm: 10px;
  --r-md: 16px;
  --r-pill: 999px;
  --gutter: 16px;
  --tap: 48px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #1F1E1D; --paper-2: #262624; --card: #2A2927; --ink: #F5F4EF; --muted: #A6A39A; --line: #3A3936;
    --teal: #D97757; --teal-ink: #FFFFFF; --teal-soft: #3A2A23; --right: #6CC28E; --right-soft: #1E3326;
    --wrong: #E58A7E; --wrong-soft: #3A2421; --focus: #D97757; --draw: #F5F4EF; --draw-fill: #3A3936; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #1F1E1D; --paper-2: #262624; --card: #2A2927; --ink: #F5F4EF; --muted: #A6A39A; --line: #3A3936;
  --teal: #D97757; --teal-ink: #FFFFFF; --teal-soft: #3A2A23; --right: #6CC28E; --right-soft: #1E3326;
  --wrong: #E58A7E; --wrong-soft: #3A2421; --focus: #D97757; --draw: #F5F4EF; --draw-fill: #3A3936; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 16px/1.55 var(--sans);
  padding-bottom: env(safe-area-inset-bottom);
}
img, svg { display: block; max-width: 100%; }
a { color: var(--teal); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 6px; }
h1, h2, h3 { font-family: var(--sans); font-weight: 500; letter-spacing: -0.02em; line-height: 1.2; margin: 0; }
p { margin: 0; }
.wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; background: var(--card); padding: 8px 12px; z-index: 10; }
.muted { color: var(--muted); }

/* Header */
.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 12px; min-height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.brand svg { width: 30px; height: 30px; }
.brand b { font: 600 21px/1 var(--sans); letter-spacing: -0.03em; }
.nav { display: none; gap: 22px; margin-left: 28px; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.top .actions { margin-left: auto; display: flex; gap: 8px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: var(--tap);
  padding: 0 20px; border-radius: 10px; border: 1px solid transparent; font: 500 15px/1 var(--sans);
  text-decoration: none; cursor: pointer; }
.btn-primary { background: var(--teal); color: var(--teal-ink); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { background: var(--paper-2); }
.btn-small { min-height: 40px; padding: 0 16px; font-size: 15px; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }

/* Hero */
.hero { padding: 36px 0 28px; }
.hero h1 { font-size: clamp(32px, 8.5vw, 52px); letter-spacing: -0.035em; line-height: 1.08; max-width: 15ch; }
.hero .lede { font-size: 18px; color: var(--muted); max-width: 46ch; margin-top: 14px; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.hero .note { font-size: 14px; color: var(--muted); margin-top: 12px; }
.hero-grid { display: grid; gap: 28px; }

/* Practice card (the live demo) */
.practice { background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: 18px;
  box-shadow: 0 1px 0 var(--line), 0 18px 40px -28px rgba(31, 29, 26, .35); }
.practice header { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.topic-tag { font-size: 13px; font-weight: 600; color: var(--teal); background: var(--teal-soft);
  padding: 4px 10px; border-radius: var(--r-pill); }
.progress { display: flex; gap: 4px; }
.progress i { width: 18px; height: 6px; border-radius: 3px; background: var(--line); }
.progress i.done { background: var(--teal); }
.progress i.now { background: var(--sun); }
.q { font: 400 19px/1.6 var(--sans); letter-spacing: -0.01em; margin: 16px 0 18px; }
.options { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.option { width: 100%; min-height: 56px; display: flex; align-items: center; gap: 14px; text-align: left;
  padding: 10px 14px; border: 1.5px solid var(--line); border-radius: 14px; background: var(--card); color: var(--ink);
  font: 500 18px/1.3 var(--sans); cursor: pointer; }
.option:hover { border-color: var(--teal); }
.option .key { flex: none; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 8px;
  background: var(--paper-2); font: 600 14px/1 var(--sans); color: var(--muted); }
.option[aria-pressed="true"] { border-color: var(--teal); background: var(--teal-soft); }
.option.is-right { border-color: var(--right); background: var(--right-soft); }
.option.is-wrong { border-color: var(--wrong); background: var(--wrong-soft); }
.practice .bar { display: flex; gap: 10px; margin-top: 16px; }
.practice .bar .btn-primary { flex: 1; }
.feedback { margin-top: 14px; border-radius: 14px; padding: 14px; font-size: 15px; }
.feedback[hidden] { display: none; }
.feedback.right { background: var(--right-soft); }
.feedback.wrong { background: var(--wrong-soft); }
.feedback strong { display: block; font-size: 16px; margin-bottom: 4px; }
.feedback ol { margin: 8px 0 0; padding-left: 20px; }
.hint { margin-top: 12px; padding: 12px 14px; border-left: 3px solid var(--sun); background: var(--paper-2);
  border-radius: 0 10px 10px 0; font-size: 15px; }
.hint[hidden] { display: none; }

/* Stacked fractions: 3 1/2 renders as a whole number and a small stacked fraction */
.frac { display: inline-flex; flex-direction: column; vertical-align: middle; text-align: center;
  font-size: .78em; line-height: 1.05; margin: 0 .08em; font-variant-numeric: lining-nums tabular-nums; }
.frac > span:first-child { border-bottom: 1.5px solid currentColor; padding: 0 .12em; }
.frac > span:last-child { padding: 0 .12em; }
.whole { margin-right: .06em; }

/* Sections */
.section { padding: 40px 0; border-top: 1px solid var(--line); }
.section h2 { font-size: clamp(24px, 5.5vw, 30px); max-width: 24ch; }
.section .kicker { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.section .intro { color: var(--muted); margin-top: 10px; max-width: 58ch; }
.strands { display: grid; gap: 10px; margin-top: 22px; }
.strand { display: grid; grid-template-columns: 44px 1fr auto; align-items: center; gap: 12px;
  padding: 12px 14px; background: var(--card); border: 1px solid var(--line); border-radius: var(--r-md);
  color: var(--ink); text-decoration: none; }
.strand:hover { border-color: var(--teal); }
.strand .glyph { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: var(--paper-2); font: 500 20px/1 var(--sans); color: var(--teal); }
.strand b { display: block; font-weight: 600; }
.strand small { color: var(--muted); font-size: 14px; }
.strand .count { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 14px; }
.steps { display: grid; gap: 18px; margin: 22px 0 0; padding: 0; list-style: none; counter-reset: step; }
.steps li { display: grid; grid-template-columns: 40px 1fr; gap: 14px; }
.steps li::before { counter-increment: step; content: counter(step); width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center; border: 1.5px solid var(--teal); color: var(--teal); font: 500 16px/1 var(--sans); }
.steps h3 { font-size: 17px; font-weight: 600; }
.steps p { color: var(--muted); margin-top: 4px; }
.promises { display: grid; gap: 14px; margin-top: 22px; }
.promise { padding: 16px; border-radius: var(--r-md); background: var(--paper-2); }
.promise h3 { font: 600 17px/1.3 var(--sans); }
.promise p { color: var(--muted); margin-top: 4px; font-size: 15px; }

/* Feature cards: a drawing panel on top, text below (after the platform docs cards) */
.features { display: grid; gap: 16px; margin-top: 24px; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; display: flex; flex-direction: column; }
.feature .art { background: var(--paper-2); border-bottom: 1px solid var(--line); height: 160px; display: grid; place-items: center; }
.feature .art { height: 180px; }
.feature .art svg { width: 156px; height: 130px; overflow: visible; }
.feature .body { padding: 18px 20px 20px; display: grid; gap: 6px; }
.feature h3 { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.feature p { color: var(--muted); font-size: 15px; }
.feature .links { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 4px; }
.feature .links a { display: flex; align-items: center; gap: 10px; min-height: 36px; color: var(--ink); text-decoration: none; font-size: 15px; }
.feature .links a:hover { color: var(--teal); }
.feature .links svg { width: 14px; height: 14px; color: var(--muted); flex: none; }
.draw { fill: none; stroke: var(--draw); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.draw-fill { fill: var(--draw-fill); stroke: var(--draw); stroke-width: 2.2; stroke-linejoin: round; }
.draw-accent { fill: var(--teal); }
.draw-sun { fill: #E9B028; stroke: var(--draw); stroke-width: 2; }

/* Hero drawing */
.hero-visual { display: grid; place-items: center; }
.hero-art { width: 100%; max-width: 520px; height: auto; overflow: visible; }
.hand { font: 500 46px/1 var(--sans); fill: var(--draw); letter-spacing: -0.02em; }
.hand-answer { fill: var(--teal); }
.sym { font: 400 30px/1 var(--sans); fill: var(--muted); }
.slice { fill: transparent; stroke-width: 2; }

/* Year 1-6 */
.years { display: grid; gap: 28px; align-items: center; }
.year-list { list-style: none; margin: 22px 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.year { display: grid; gap: 2px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
.year b { font-weight: 600; }
.year span { font-size: 13px; color: var(--muted); }
.year.open { border-color: var(--teal); background: var(--teal-soft); }
.year.open span { color: var(--teal); font-weight: 500; }
.years-visual { background: var(--paper-2); border: 1px solid var(--line); border-radius: 14px; padding: 24px; display: grid; place-items: center; }
.years-art { width: 100%; max-width: 340px; height: auto; overflow: visible; }
.step-labels text { font: 600 14px/1 var(--sans); fill: var(--muted); }
.climber { offset-path: path("M33 153L79 127L125 101L171 75L217 49L267 23"); offset-rotate: 0deg; }

/* Demo question section */
.try { display: grid; gap: 24px; align-items: start; }
.coin-text, .bubble-text { font: 600 15px/1 var(--sans); fill: var(--draw); }
.heart { fill: #E0245E; stroke: var(--draw); stroke-width: 1.6; }

/* Footer */
.foot { border-top: 1px solid var(--line); padding: 28px 0 36px; font-size: 14px; color: var(--muted); }
.foot .wrap { display: grid; gap: 14px; justify-items: center; text-align: center; }
.foot nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 18px; }
.foot .heart { color: #E0245E; }
.foot .credit a { color: var(--ink); font-weight: 500; text-decoration: none; }
.foot .credit a:hover { text-decoration: underline; }
.foot nav a { color: var(--ink); text-decoration: none; }
.foot nav a:hover { text-decoration: underline; }

/* Document pages (legal) */
.doc { display: grid; gap: 24px; padding: 28px 0 48px; }
.doc .toc { font-size: 15px; border: 1px solid var(--line); border-radius: var(--r-md); padding: 12px 16px; background: var(--card); }
.doc .toc summary { cursor: pointer; font-weight: 600; min-height: 32px; display: flex; align-items: center; }
.doc .toc ol { margin: 8px 0 4px; padding-left: 20px; }
.doc .toc li { margin: 6px 0; }
.doc .toc a { color: var(--ink); text-decoration: none; }
.doc .toc a:hover { color: var(--teal); }
.doc article { max-width: 70ch; }
.doc article h1 { font-size: clamp(30px, 7vw, 42px); }
.doc article .meta { color: var(--muted); font-size: 14px; margin-top: 10px; }
.doc article h2 { font-size: 23px; margin: 34px 0 10px; scroll-margin-top: 80px; }
.doc article p, .doc article li { font: 400 16px/1.7 var(--sans); }
.doc article p + p { margin-top: 12px; }
.doc article ul { padding-left: 22px; margin: 10px 0; }
.doc article li { margin: 6px 0; }
.callout { margin-top: 18px; padding: 14px 16px; border-radius: 14px; background: var(--teal-soft); font-size: 15px; }
.doc .other { font-size: 15px; }
.doc .other h2 { font: 600 15px/1.3 var(--sans); margin: 0 0 8px; color: var(--muted); }
.doc .other a { display: block; padding: 6px 0; color: var(--ink); text-decoration: none; }
.doc .other a[aria-current="page"] { color: var(--teal); font-weight: 600; }

/* Login */
.auth { min-height: calc(100dvh - 61px); display: grid; align-items: start; padding: 32px 0 48px; }
.auth-card { max-width: 480px; margin: 0 auto; width: 100%; background: var(--card); border: 1px solid var(--line);
  border-radius: 18px; overflow: hidden; box-shadow: 0 24px 60px -40px rgba(20, 20, 19, .45); }
.auth-art { background: var(--paper-2); border-bottom: 1px solid var(--line); height: 190px; display: grid; place-items: center; }
.auth-art svg { width: 230px; height: 170px; overflow: visible; }
.auth-body { padding: 24px 20px 26px; }
.auth .who { background: var(--paper); }
.auth-card h1 { font-size: clamp(30px, 8vw, 40px); }
.auth-card .lede { color: var(--muted); margin-top: 10px; }
.btn-google { width: 100%; background: var(--card); color: var(--ink); border-color: var(--line); margin-top: 24px; }
.btn-google:hover { background: var(--paper-2); }
.btn-google svg { width: 20px; height: 20px; }
.consent { display: flex; gap: 12px; align-items: flex-start; margin-top: 18px; font-size: 15px; }
.consent input { width: 22px; height: 22px; margin: 1px 0 0; accent-color: var(--teal); flex: none; }
.who { margin-top: 26px; padding: 16px; border: 1px solid var(--line); border-radius: var(--r-md); background: var(--card); }
.who h2 { font: 600 16px/1.3 var(--sans); }
.who ul { margin: 8px 0 0; padding-left: 20px; color: var(--muted); font-size: 15px; }
.who li { margin: 4px 0; }
.fine { font-size: 13px; color: var(--muted); margin-top: 18px; }

@media (min-width: 720px) {
  .features.three { grid-template-columns: repeat(3, 1fr); }
  .years { grid-template-columns: 1.1fr 1fr; gap: 48px; }
  .year-list { grid-template-columns: repeat(3, 1fr); }
  .try { grid-template-columns: 1fr 1.1fr; gap: 48px; }
  .auth-body { padding: 28px 32px 32px; }
  .features { grid-template-columns: 1fr 1fr; gap: 24px; }
  :root { --gutter: 28px; }
  .nav { display: flex; }
  .hero { padding: 64px 0 48px; }
  .hero-grid { grid-template-columns: 1.05fr 1fr; align-items: center; gap: 48px; }
  .practice { padding: 24px; }
  .strands { grid-template-columns: 1fr 1fr; }
  .promises { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .steps li { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .auth { align-items: center; }
}
@media (min-width: 1000px) {
  .strands { grid-template-columns: repeat(3, 1fr); }
  .doc { grid-template-columns: 220px minmax(0, 1fr); gap: 56px; padding-top: 48px; }
  .doc aside { position: sticky; top: 84px; align-self: start; display: grid; gap: 24px; }
  .doc .toc { border: 0; padding: 0; background: none; }
  .doc .toc summary { pointer-events: none; color: var(--muted); font-size: 14px; }
  .doc .toc summary::marker { content: ""; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
  .option, .btn { transition: background-color .15s, border-color .15s, filter .15s; }
  .feedback:not([hidden]), .hint:not([hidden]) { animation: reveal .22s ease-out; }
  /* Drawings move gently; reduced motion turns them off */
  .a-write { stroke-dasharray: 60; stroke-dashoffset: 60; animation: write 3.2s ease-in-out infinite; }
  .a-pencil { animation: pencil 3.2s ease-in-out infinite; }
  .a-glow { animation: glow 2.4s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
  .a-bob { animation: bob 3s ease-in-out infinite; }
  .a-hop { animation: hop 2.8s cubic-bezier(.5,0,.5,1) infinite; }
  .a-bar1, .a-bar2, .a-bar3 { transform-box: fill-box; transform-origin: bottom; animation: bar 3.6s ease-in-out infinite; }
  .a-bar2 { animation-delay: .3s; }
  .a-bar3 { animation-delay: .6s; }
  .a-twinkle { animation: twinkle 3.6s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
  .a-drift { animation: drift 7s ease-in-out infinite; }
  .a-drift-2 { animation: drift 9s ease-in-out -3s infinite reverse; }
  @keyframes write { 0%, 15% { stroke-dashoffset: 60; } 55%, 85% { stroke-dashoffset: 0; } 100% { stroke-dashoffset: 60; } }
  @keyframes pencil { 0%, 15% { transform: translate(-14px, 4px); } 35% { transform: translate(-6px, 12px); } 55%, 85% { transform: translate(10px, -6px); } 100% { transform: translate(-14px, 4px); } }
  @keyframes glow { 0%, 100% { opacity: .25; transform: scale(.92); } 50% { opacity: 1; transform: scale(1.06); } }
  @keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-4px); } }
  @keyframes hop { 0%, 8% { transform: translate(0, 0); } 22% { transform: translate(12px, -28px); } 33%, 41% { transform: translate(24px, -16px); } 55% { transform: translate(36px, -44px); } 66%, 80% { transform: translate(48px, -32px); } 92% { transform: translate(24px, -10px); } 100% { transform: translate(0, 0); } }
  @keyframes bar { 0%, 100% { transform: scaleY(.45); } 50% { transform: scaleY(1); } }
  @keyframes twinkle { 0%, 60%, 100% { transform: scale(.6) rotate(0); opacity: .4; } 75% { transform: scale(1.15) rotate(20deg); opacity: 1; } }
  .a-float { animation: float 6s ease-in-out infinite; }
  .a-answer { animation: answer 6s ease-in-out infinite; }
  .a-underline { stroke-dasharray: 150; stroke-dashoffset: 150; animation: underline 6s ease-in-out infinite; }
  .a-pencil2 { animation: pencil2 6s ease-in-out infinite; }
  .a-rock { animation: rock 5s ease-in-out infinite; transform-box: fill-box; transform-origin: bottom left; }
  .slice { animation: slice 6s linear infinite; }
  .slice-1 { animation-delay: .4s; } .slice-2 { animation-delay: .8s; } .slice-3 { animation-delay: 1.2s; } .slice-4 { animation-delay: 1.6s; }
  .slice-5 { animation: none; }
  .climber { animation: climb 5s cubic-bezier(.45, 0, .55, 1) infinite; }
  .a-flip { animation: flip 4s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
  .a-pulse { animation: pulse 1.6s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
  .bubble-a { animation: bubble 4s ease-in-out infinite; transform-box: fill-box; transform-origin: bottom left; }
  .bubble-b { animation: bubble 4s ease-in-out -2s infinite; transform-box: fill-box; transform-origin: bottom right; }
  @keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
  @keyframes answer { 0%, 30% { opacity: 0; transform: translateX(-6px); } 45%, 88% { opacity: 1; transform: none; } 100% { opacity: 0; } }
  @keyframes underline { 0%, 45% { stroke-dashoffset: 150; } 62%, 88% { stroke-dashoffset: 0; } 100% { stroke-dashoffset: 150; } }
  @keyframes pencil2 { 0%, 20% { transform: translate(-150px, -60px); } 42% { transform: translate(-40px, 0); } 62%, 88% { transform: translate(0, 18px); } 100% { transform: translate(-150px, -60px); } }
  @keyframes rock { 0%, 100% { transform: rotate(-4deg); } 50% { transform: rotate(4deg); } }
  @keyframes slice { 0%, 8% { fill: transparent; } 14%, 80% { fill: var(--teal); } 92%, 100% { fill: transparent; } }
  @keyframes climb { 0%, 6% { offset-distance: 0%; } 86%, 94% { offset-distance: 100%; } 100% { offset-distance: 0%; } }
  @keyframes flip { 0%, 40%, 100% { transform: scaleX(1); } 55% { transform: scaleX(.1); } 70% { transform: scaleX(1); } }
  @keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.15); } }
  @keyframes bubble { 0%, 100% { transform: scale(1); opacity: 1; } 40% { transform: scale(.92); opacity: .55; } }
  .a-arrow { animation: arrow 4.5s cubic-bezier(.2, .8, .3, 1) infinite; }
  .a-ring { animation: ring 4.5s ease-out infinite; transform-box: fill-box; transform-origin: center; }
  @keyframes arrow { 0% { transform: translate(-130px, 70px); opacity: 0; } 8% { opacity: 1; } 30%, 88% { transform: translate(0, 0); opacity: 1; } 100% { transform: translate(0, 0); opacity: 0; } }
  @keyframes ring { 0%, 28% { transform: scale(.8); opacity: 0; } 34% { opacity: 1; } 55%, 100% { transform: scale(1.5); opacity: 0; } }
  @keyframes drift { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(8px); } }
  @keyframes reveal { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
}

/* Hamburger menu (shown on narrow screens) */
.burger { display: inline-grid; align-content: center; justify-items: center; gap: 5px; width: 44px; height: 44px; padding: 0; border: 1px solid var(--line); border-radius: 10px; background: var(--card); cursor: pointer; }
.burger span { display: block; width: 18px; height: 2px; border-radius: 2px; background: var(--ink); transition: transform .18s, opacity .18s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mnav { border-top: 1px solid var(--line); background: var(--paper); padding: 8px var(--gutter) 14px; display: grid; }
.mnav[hidden] { display: none; }
.mnav a { display: flex; align-items: center; min-height: 48px; color: var(--ink); text-decoration: none; font-weight: 500; border-bottom: 1px solid var(--line); }
.mnav a:last-child { border-bottom: 0; }
.top .actions { align-items: center; }
@media (min-width: 720px) { .top .burger, .top .mnav { display: none; } }
@media (prefers-reduced-motion: reduce) { .burger span { transition: none; } }

/* Wide desktops: bigger hero and sections */
@media (min-width: 1100px) {
  .hero { padding: 84px 0 72px; }
  .hero h1 { font-size: 64px; max-width: 14ch; }
  .hero .lede { font-size: 20px; max-width: 48ch; }
  .hero-grid { gap: 72px; }
  .hero-art { max-width: 620px; }
  .section { padding: 88px 0; }
  .section h2 { font-size: 36px; }
  .section .intro { font-size: 18px; }
  .feature .art { height: 220px; }
  .feature .art svg { width: 190px; height: 160px; }
  .feature h3 { font-size: 18px; }
  .feature p { font-size: 16px; }
  .years-art { max-width: 420px; }
  .years-visual { padding: 40px; }
}

/* Alternate the picture side: hero right, Tahun left, Cuba right */
@media (min-width: 720px) {
  .years .years-visual { order: -1; }
}
.try-art { display: none; }
@media (min-width: 720px) { .try-art { display: grid; place-items: center; margin-top: 20px; } }
.try-art svg { width: 220px; height: 170px; overflow: visible; }
.dart-tip { fill: var(--teal); }


/* ===== Typography (clean, calm, editorial): Inter for the interface, Source Serif 4 only for page titles and large headings ===== */
@media (max-width: 719px) { :root { --text-h1: 32px; --text-h2: 24px; } }
html { font-feature-settings: "dlig" 0; }
body { font-family: var(--font-sans); font-size: var(--text-body); line-height: var(--lh-body); font-weight: 400; font-feature-settings: "dlig" 0; }
h1, h2 { font-family: var(--font-serif); }
h1 { font-size: var(--text-h1); line-height: var(--lh-h1); font-weight: 500; letter-spacing: -0.02em; }
h2 { font-size: var(--text-h2); line-height: var(--lh-h2); font-weight: 500; letter-spacing: -0.01em; }
h3 { font-family: var(--font-sans); font-size: var(--text-h3); line-height: var(--lh-h3); font-weight: 600; letter-spacing: -0.005em; }
code, kbd, pre, samp { font-family: var(--font-mono); font-size: var(--text-code); line-height: var(--lh-code); font-weight: 400; }
.hero h1 { font-size: var(--text-display); line-height: var(--lh-h1); font-weight: 500; letter-spacing: -0.02em; max-width: 14ch; }
.hero .lede { font-size: 18px; line-height: 1.6; }
.section h2 { font-size: var(--text-h2); line-height: var(--lh-h2); font-weight: 500; letter-spacing: -0.01em; max-width: 26ch; }
.section .intro, .hero .lede, .auth-card .lede { max-width: 60ch; }
.section .kicker { font-size: var(--text-label); line-height: 1.4; font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 10px; }
.auth-card h1 { font-size: var(--text-h1); line-height: var(--lh-h1); }
.feature h3, .steps h3 { font-size: var(--text-h3); line-height: var(--lh-h3); font-weight: 600; letter-spacing: -0.005em; }
.promise h3 { font: 600 var(--text-body)/1.4 var(--font-sans); }
.nav a, .mnav a, .foot, .foot nav a, .btn-small { font-size: var(--text-small); }
.nav a { font-weight: 500; }
.fine, .meta, .note, .strand small, .strand .count { font-size: var(--text-small); line-height: var(--lh-small); }
.foot { line-height: var(--lh-small); }

/* prose pages: ~70 characters per line, generous spacing around headings */
.doc article { max-width: var(--measure); }
.doc article h1 { font-size: var(--text-h1); line-height: var(--lh-h1); }
.doc article h2 { font-size: var(--text-h2); line-height: var(--lh-h2); margin: 1.75em 0 0.5em; }
.doc article p, .doc article li { font: 400 var(--text-body)/var(--lh-body) var(--font-sans); }
.doc article p + p { margin-top: 1em; }
.doc article .meta { font-size: var(--text-small); margin-top: 12px; }
.callout { font-size: var(--text-small); line-height: var(--lh-small); }
.doc .toc, .doc .other { font-size: var(--text-small); }
.hero h1 { max-width: 22ch; }
.sub { color: var(--muted); }


/* FAQ section (replaces the try-a-question section) */
.faq { display: grid; gap: 28px; align-items: start; }
.faq-art { display: none; }
.faq-art svg { width: 220px; height: 170px; overflow: visible; }
.faq-mark { font: 600 44px/1 var(--font-sans); fill: var(--teal); }
.qa-list { border-top: 1px solid var(--line); }
.qa { border-bottom: 1px solid var(--line); }
.qa summary { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 60px; padding: 12px 0; cursor: pointer; list-style: none; font-weight: 500; font-size: 17px; line-height: 1.4; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: ""; flex: none; width: 10px; height: 10px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(45deg); margin-top: -4px; transition: transform .18s; }
.qa[open] summary::after { transform: rotate(-135deg); margin-top: 4px; }
.qa summary:hover { color: var(--teal); }
.qa p { color: var(--muted); padding: 0 32px 18px 0; max-width: 62ch; }
@media (min-width: 720px) { .faq { grid-template-columns: 1fr 1.25fr; gap: 56px; } .faq-art { display: block; margin-top: 28px; } }
@media (prefers-reduced-motion: reduce) { .qa summary::after { transition: none; } }

/* Footer: three columns */
.foot .wrap { display: block; justify-items: stretch; text-align: left; }
.foot-grid { display: grid; gap: 28px; padding-bottom: 28px; }
.foot-about p { margin-top: 12px; max-width: 34ch; color: var(--muted); font-size: var(--text-small); line-height: var(--lh-small); }
.foot nav { display: grid; align-content: start; justify-content: start; gap: 2px; }
.foot nav h2 { font: 500 var(--text-label)/1.4 var(--font-sans); text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 8px; }
.foot nav a { display: inline-flex; align-items: center; min-height: 36px; color: var(--ink); text-decoration: none; font-size: var(--text-small); }
.foot nav a:hover { color: var(--teal); text-decoration: underline; }
.foot .credit { border-top: 1px solid var(--line); padding-top: 20px; text-align: center; color: var(--muted); font-size: var(--text-small); }
@media (min-width: 720px) { .foot-grid { grid-template-columns: 1.5fr 1fr 1fr; gap: 48px; } }

/* Wordmark (logo option C): the q's bowl is a fraction circle */
.brand .wordmark { display: block; width: 70px; height: 40px; color: var(--ink); }
.foot .brand .wordmark { width: 64px; height: 37px; }

/* Hero video (motion graphic) */
.video-frame { position: relative; width: 100%; aspect-ratio: 16 / 9; border-radius: 20px; overflow: hidden; border: 1px solid var(--line);
  background: var(--paper-2); box-shadow: 0 30px 70px -45px rgba(31, 30, 29, .55); }
.video-frame video { display: block; width: 100%; height: 100%; object-fit: cover; }
.sound-btn { position: absolute; left: 14px; bottom: 14px; display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 16px;
  border: 0; border-radius: 999px; background: rgba(31, 30, 29, .82); color: #FAF9F5; font: 500 var(--text-small)/1 var(--font-sans); cursor: pointer; }
.sound-btn:hover { background: rgba(31, 30, 29, .95); }
.sound-btn svg { width: 18px; height: 18px; }
@media (min-width: 1100px) { .hero-grid { grid-template-columns: 1fr 1.15fr; } }